GG,
There is no one correct answer. What it takes is sitting down and looking at a lot of variables in terms of transitioning to retirement and trying to come up with different scenarios factoring in those variables with each major shift (full retirement age, early retirement, one retires early one doesn't, one surviving spouse, etc.) and measuring them against current status. Some of those variables are:
- Defined Benefit Income (pensions, SS, etc.)
- Defined Contribution Assets (401K, IRA's, investments, etc.)\
- Medical benefits (Current, post employment employer plan (?), Medicare, etc.)
- Housing costs (is there a mortgage, rental, home ownership).
- How much will there be in retirement income compared to current employment income as a function of the standard of living you are aiming for? Some planner's say 80-90% of current income at retirement but even that is a guess.
In our case my wife and I are the same age so that is not a factor. I'm the higher wage earner but her employer provides better benefits (medical). I currently have a spreadsheet with 18 different tabs for different scenarios. In our baseline scenario, the bulk of are retirement income will come from our Defined Benefit income. That alone replaces 93.7% of our current income, but, and this is a big but, we will be paying off the home mortgage right around the time of retirement. So even though Defined Benefit retirement income will go down to 93.7% of current income, disposable income will go UP because of the elimination of the monthly mortgage.
The Defined Contribution Assets are our "shock absorber". The baseline retirement budget allows us to maintain our standard of living and even do a little travel based solely on Defined Benefits income, the Defined Contribution Assets will not need to be touched in the near term. That means those assets will continue to grow and our projections use a modest 3-4% growth rate. If we were to leave the principal alone and only take interest each year it would raise total retirement income to 109.3% (at 3% return) to 112.6% (at 4% return) of current employment income. (Ya, that's a nice place to be.)
But important scenarios to include are what will be the financial plan for the surviving spouse in the event the other passes in terms of the previously mentioned variables.
This year I added to the normal scenario tabs ones for "What happens if SS goes away in 2035?" and "What happens if SS is reduced by 25% in 2035". Because we have other revenue streams, a 25% reduction in SS causes a 10% reduction in total Defined Benefit Income, not enjoyable but survivable. A total elimination of SS (unlikely) would be a lot harder and would require dipping into Define Contribution Assets well ahead of schedule. But only time will tell.
We split out thinking between Defined Benefits Income and Defined Contribution Assets for one important reason. Defined Benefits stuff goes away when we pass. However Defined Contribution Assets are ours and can be passed down to beneficiaries upon our passing (if we don't spend it all - LOLz).
WW